I actually am from the box/manual generation and never heard it called 'feelies'.. I remember to register some games i would have to look up charts or keys in the manual, or on page numbers
IIRC 'feelies' was a term coined at Infocom by Brian Moriarty for the extra gewgaws that wound up in the boxes. I don't think the term was used much elsewhere in the industry, even though it did become part of the general gamer vernacular at the time.